Patch "ARM: dts: imx6sx-sdb: Remove OPP override" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

ARM: dts: imx6sx-sdb: Remove OPP override

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
arm-dts-imx6sx-sdb-remove-opp-override.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Leonard Crestez <[email protected]>
Date: Fri, 5 May 2017 14:00:17 +0300
Subject: ARM: dts: imx6sx-sdb: Remove OPP override

From: Leonard Crestez <[email protected]>

commit d8581c7c8be172dac156a19d261f988a72ce596f upstream.

The board file for imx6sx-sdb overrides cpufreq operating points to use higher voltages. This is done because the board has a shared rail for VDD_ARM_IN and VDD_SOC_IN and when using LDO bypass the shared voltage needs to be a value suitable for both ARM and SOC.

This only applies to LDO bypass mode, a feature not present in upstream. When LDOs are enabled the effect is to use higher voltages than necessary for no good reason.

Setting these higher voltages can make some boards fail to boot with ugly semi-random crashes reminiscent of memory corruption. These failures only happen on board rev. C, rev. B is reported to still work.

---
 arch/arm/boot/dts/imx6sx-sdb.dts |   17 -----------------
 1 file changed, 17 deletions(-)

@@ -12,23 +12,6 @@
 	model = "Freescale i.MX6 SoloX SDB RevB Board";
 };
 
-&cpu0 {
-	operating-points = <
-		/* kHz    uV */
-		996000  1250000
-		792000  1175000
-		396000  1175000
-		198000  1175000
-		>;
-	fsl,soc-operating-points = <
-		/* ARM kHz      SOC uV */
-		996000	1250000
-		792000	1175000
-		396000	1175000
-		198000  1175000
-	>;
-};
-
 &i2c1 {
 	clock-frequency = <100000>;
 	pinctrl-names = "default";

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/arm-dts-imx6sx-sdb-remove-opp-override.patch